/Engine/Source/Runtime/Landscape/Classes/LandscapeSplinesComponent.h
Returns the matchingULandscapeSplinesComponentfor a given level,can return null
[ULandscapeSplinesComponent](API\Runtime\Landscape\ULandscapeSplinesComponent) * GetStreamingSplinesComponentForLevel ( [ULevel](API\Runtime\Engine\Engine\ULevel) * Level, bool bCreate )